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首页> 外文期刊>Optics Letters >Tunable plasmon-induced transparency in a grating-coupled double-layer graphene hybrid system at far-infrared frequencies
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Tunable plasmon-induced transparency in a grating-coupled double-layer graphene hybrid system at far-infrared frequencies

机译：光栅耦合双层石墨烯杂化系统中可调谐等离子体激元引起的透明性

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摘要

A grating-coupled double-layer graphene hybrid system is proposed to investigate the plasmon-induced transparency effect at far-infrared frequencies. Based on the guided mode resonance principle, a diffractive grating is used to couple the normally incident waves and excite the plasmonic resonances on two graphene films separated by a spacer, thereby avoiding the need for patterning graphene. It is found that the origin of the observed transparency window transforms from Autler-Townes splitting to electromagnetically induced transparency with the increase of the separation distance between the two graphene films. The tunability of this hybrid system is also investigated via varying the Fermi energy in graphene. The proposed hybrid system has potential applications in tunable switches, sensors, and slow light devices and may open up new avenues for constructing easy-to-fabricate graphene-based plasmonic devices. (C) 2016 Optical Society of America
机译：提出了一种光栅耦合双层石墨烯混合体系，以研究等离子体在远红外频率下的透明效应。基于导模共振原理，衍射光栅用于耦合法向入射波，并在由隔片分隔的两个石墨烯薄膜上激发等离子体共振，从而避免了对石墨烯进行构图的需求。发现随着两个石墨烯膜之间的分离距离的增加，观察到的透明窗的起源从奥特勒-唐斯分裂转变为电磁感应的透明。还通过改变石墨烯中的费米能来研究这种混合系统的可调性。拟议中的混合系统在可调开关，传感器和慢光设备中具有潜在的应用，并可能为构造易于制造的基于石墨烯的等离激元设备开辟新的途径。 （C）2016美国眼镜学会

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